package com.flyox.game.militarychess.util;

public class ConvertUtil {
	public static String byte2hex(byte[] b) // 二行制转字符串
	{
		String hs = "";
		String stmp = "";
		for (int n = 0; n < b.length; n++) {
			stmp = (java.lang.Integer.toHexString(b[n] & 0XFF));
			if (stmp.length() == 1)
				hs = hs + "0" + stmp;
			else
				hs = hs + stmp;
			if (n < b.length - 1)
				hs = hs + ":";
		}
		return hs.toUpperCase();
	}
	
	// 整数到字节数组转换
	 public static byte[] int2bytes(int n) {
	  byte[] ab = new byte[4];
	  ab[0] = (byte) (0xff & n);
	  ab[1] = (byte) ((0xff00 & n) >> 8);
	  ab[2] = (byte) ((0xff0000 & n) >> 16);
	  ab[3] = (byte) ((0xff000000 & n) >> 24);
	  return ab;
	 }

	 // 字节数组到整数的转换
	 public static int bytes2int(byte b[]) {
	  int s = 0;
	  s = ((((b[0] & 0xff) << 8 | (b[1] & 0xff)) << 8) | (b[2] & 0xff)) << 8
	    | (b[3] & 0xff);
	  return s;
	 }

	 // 字节转换到字符
	 public static char byte2char(byte b) {
	  return (char) b;
	 }

	 private final static byte[] hex = "0123456789ABCDEF".getBytes();

	 private static int parse(char c) {
	  if (c >= 'a')
	   return (c - 'a' + 10) & 0x0f;
	  if (c >= 'A')
	   return (c - 'A' + 10) & 0x0f;
	  return (c - '0') & 0x0f;
	 }

	 // 从字节数组到十六进制字符串转换
	 public static String Bytes2HexString(byte[] b) {
	  byte[] buff = new byte[2 * b.length];
	  for (int i = 0; i < b.length; i++) {
	   buff[2 * i] = hex[(b[i] >> 4) & 0x0f];
	   buff[2 * i + 1] = hex[b[i] & 0x0f];
	  }
	  return new String(buff);
	 }

	 // 从十六进制字符串到字节数组转换
	 public static byte[] HexString2Bytes(String hexstr) {
	  byte[] b = new byte[hexstr.length() / 2];
	  int j = 0;
	  for (int i = 0; i < b.length; i++) {
	   char c0 = hexstr.charAt(j++);
	   char c1 = hexstr.charAt(j++);
	   b[i] = (byte) ((parse(c0) << 4) | parse(c1));
	  }
	  return b;
	 }

}
